Accession Number : AD0917915


Title :   Suitability Study of Flux-Switched Inductor Alternators for Use in Hybrid Electric Propulsion Systems.


Descriptive Note : Research and development rept.,


Corporate Author : DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD


Personal Author(s) : Steen, D B


Report Date : Mar 1974


Pagination or Media Count : 58


Abstract : A 5000 horsepower inductor alternator and a 5000 horsepower flux-switched inductor alternator suitable for direct drive from a 15,000 revolutions per minute gas turbine output shaft are analyzed. The ultimate use for these alternators is in a hybrid propulsion system consisting of one of the alternators, a rectifier, and a direct-current homopolar motor with superconductive field windings. The analysis consists of determining the losses associated with each machine, the characteristics of the magnetic path in each machine including magnetic flux plots within a typical machine, and the calculation of the electrical and the mechanical characteristics of each machine. Because of the uniqueness of the machine, the equations used in the analysis and the method of applying them to the machines are presented. From these equation, a scaling equation for each machine was derived for use in sizing machines with ratings that are different from those of the machines that were analyzed. From these equations, recommendations for improving the power density of the machines are made. (Author)


Descriptors :   *ALTERNATORS , ELECTRIC PROPULSION , ELECTRIC COILS , HYBRID PROPULSION , SUPERCONDUCTIVITY , GAS TURBINES , ELECTRIC GENERATORS , ELECTRIC MOTORS , RECTIFIERS , ELECTRIC MOTOR STATORS , LAMINATES , FLUX(RATE) , SWITCHING , MAGNETIC FIELDS , SCALING FACTOR , EQUATIONS , MARINE PROPULSION , MOTOR GENERATORS


Subject Categories : Electric Power Production and Distribution
      Marine Engineering
      Electric and Ion Propulsion


Distribution Statement : APPROVED FOR PUBLIC RELEASE